Question 692859
Since you get {{{ x < -5 }}}, my method is to
check by saying {{{ x = -5.001 }}}
{{{ x - 7 < -12 }}}
{{{ -5.001 - 7 < -12 }}}
{{{ -12.001 < -12 }}}
This is true
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What they say is " For what value of {{{ x }}} does
the inequality begin to fail ?"
They could have said it fails for
{{{ x < -4.999 }}}, but it also fails for
{{{ x < -4.9999 }}} , and also for
{{{ x < -4.99999 }}}
This approaches {{{ x = -5 }}}
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Also, they could say the inequality passes for
{{{ x > -5.001 }}}, but also for
{{{ x > -5.0001 }}} also for
{{{ x > -5.00001 }}}
It does not pass when
{{{ x = -5 }}}
Hope this helps